ESO Organisation Release eso1140: Full-size Mock-up of World’s Largest Telescope Mirror Built at ESO’s Open House Day. On Saturday 15 October, the European Southern Observatory (ESO) opened the doors of its headquarters in Garching bei München, Bavaria, Germany, to the public. Throughout the day, thousands of visitors had the chance to help build a full-size mock-up mirror ...

On Saturday 15 October, the European Southern Observatory (ESO) opened the doors of its headquarters in Garching bei München, Bavaria, Germany, to the public. Throughout the day, thousands of visitors had the chance to help build a full-size mock-up mirror of the largest planned telescope in the world — the European Extremely Large Telescope (E-ELT) — and to experience many other aspects of ESO’s work.